Best used amp for around 500


I'm am desperately trying to upgrade from a Denon AVR-3300 receiver. Looking for a stereo amp for the fronts. I'm entertaining the idea of a five channel amp, but I don't yet have DVD-Audio or SACD, and money is an issue. The receiver is fine for movies, but for music...well, it won't do. I'm currently running Acoustic Energy Aegis 3's for the fronts - silk dome tweets, pretty warm, laid back sound. Any suggestions?
dklap
Stratos: Heard it and I like it if you go for the SS sound. Good prices on used. Get the 120,000uF cap upgrade.

I remain,
Yes the Odyssey Stratos is a great amp. But they usually go for 700 dollars used.
Dan,

The pre-amp portion of your system has as much, or more, effect on your overall sound as does the amp. This is why people are asking about whether you plan to use your receiver as a pre-amp -- your receiver will continue to be a limiting factor. You might want to see if you can borrow an amp somehow to test with, and buy it only if it really gives improved sound. Perhaps a store in your area that sells used or demo equipment?

- Eric
Ehart gives good advice. Is why I suggested a tube pre amp but that's my prejudice. He is right that the pre is important.

I remain,
Audio Refinement Complete (50/80w/ch 8/4ohms) is a remarkably good integrated; available used around $700 wih a very cool remote.